This is a great offer if you can stay two nights at above mentioned properties by March 31. These free night awards should book into regular award inventory and thus are rather easy to use.

There is no word on the T&Cs that this offer would be targeted to certain members. I believe that it is open for all.

Here are the terms and conditions of this promotion:

Free Night Offer is available for IHG Rewards Club Members who register for the Offer and complete 2 nights at selected UK hotels between 17 December 2018 and 31 March 2019. Members must book (Qualifying rates only) and stay 2 nights (can be taken non-consecutively) at the following UK based hotels: Kimpton Fitzroy London; voco St David’s, Cardiff; The Met Hotel (Leeds); Principal York; Principal Manchester; Principal Edinburgh Charlotte Square; Principal Edinburgh George Street; Blythswood Square (Glasgow); and Wotton House. After completing the 2 nights, member will receive one Free night in a standard room only (room rate only, taxes and fees may apply) at participating IHG hotel worldwide (excluding Army hotels, InterContinental Alliance resorts and Regent Hotels). Free night must be used by 31 October 2019 and no extensions will be allowed. Elite benefits will not apply to the Free night and you will not earn IHG Rewards Club points. The Free night cannot be combined with any other Offer. Booking of the Free night is subject to hotel availability and if not used prior to 31 October 2019, will be forfeited. IHG Rewards Club reserves the right to restrict, suspend, modify, or cancel this free night offer at any time without notice. Subject to IHG Rewards Club terms and conditions. View full IHG Rewards Club Terms and Conditions at https://www.ihg.com/content/gb/en/customer-care/member-tc.html